High-power 3.8μm tunable optical parametric oscillator based on PPMgO:CLN

Peng, Yongmei; Wei, Xingbin; Wang, Weimin; Liu, Deming

doi:10.1016/j.optcom.2010.05.059

Cited by 22 publications

(11 citation statements)

References 6 publications

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“…The M 2 factors were 2.03 and 5.89 in the parallel and perpendicular directions, respectively [17]. Furthermore, the output power was able to reach 22.6 W by increasing the pump power to 150 W, and the M 2 factors in the two axes were 1.74 and 4.86, respectively [18]. However, there is a huge difference of the M 2 factors between the two axes because the MgO:PPLN was pumped by an elliptical beam.…”

Section: Introductionmentioning

confidence: 93%

Performance Studies of High-Power Optical Parametric Oscillators Pumped by a Pulsed Fiber Laser

Shao

et al. 2023

Applied Sciences

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High-power optical parametric oscillators (OPOs), as mature radiation sources in mid-infrared (MIR), degenerate gradually with wavelength increase, mainly above 3700 nm. Using a periodically poled magnesium-oxide-doped lithium niobate (MgO:PPLN) as the nonlinear crystal, we build a high-power signal-resonant OPO pumped by ytterbium-doped fiber laser (YDFL). To improve the OPO’s output power at ~3.8 μm, the parameters, such as the pump beam’s waist diameter and location, the curvature radius of the output coupler and the length of MgO:PPLN, are discussed in detail. When pump power is 79 ± 4 W with a repetition rate of 200 kHz, the OPO provides up to 8 ± 0.4 W average power in beam quality with M2 factors of ~1.84 and ~1.69 in the two axes. Under the highest output power, the center wavelength of the idler beam is 3768.4 nm with a full-width at half-maximum (FWHM) bandwidth of ~18.6 nm. When the output power reaches ~6.3 W, its power stability is 1.6% root mean square (RMS) over 7 h. Further analysis of the factors affecting OPO’s performance and simple structure are critically essential for compact OPO prototypes with a capacity of high output power.

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Section: Introductionmentioning

confidence: 93%

Performance Studies of High-Power Optical Parametric Oscillators Pumped by a Pulsed Fiber Laser

Shao

et al. 2023

Applied Sciences

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“…As a result, the elliptical pump laser can boost the nonlinear crystal's usage rate in addition to broadening the linewidth of the output lasers. In 2010, Peng et al used a 1064 nm acousto-optical Q-switched Nd:YAG laser to pump PPMgO:CLN crystal and achieved a 3.86 µm laser with an output power of 22.6 W. The usage of an elliptical beam profile increased the gain volume and reduced the possibility of crystal damage [24].…”

Section: Elliptical Pump Profilementioning

confidence: 99%

High-efficiency broad-linewidth widely-tunable mid-infrared OPO based on fan-out PPLT

Liu¹,

Ye²,

Zhang³

et al. 2023

Laser Phys.

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We reported a high-efficiency, broad-linewidth, wide-tuning-range singly-resonated optical parametric oscillator (OPO) based on a fan-out PPLT crystal. When the PPLT crystal was operated at 120 °C and pumped by Q-switched 1064 nm laser at 14.17 W with a circular pump profile, the overall output power of OPO was 7.22 W (η = 50.4%) for both the signal and idler waves. The central wavelength and linewidth of the mid-infrared (MIR) laser were 3770 nm and ∼40 nm. A wavelength tuning range of 3538–3941 nm was accomplished by adjusting the crystal period through simple mechanical movement. Due to the larger coverage of gratings with an elliptical pump profile, the output linewidth of the MIR laser was further broadened to ∼100 nm, which is ten times more than other non-fan-out PPLT OPOs. Both pumping methods with different profiles were operated at 30 kHz, 49.2 ns for the 1064 nm laser, the power fluctuation of the obtained MIR laser was within 3.5%.

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“…The wavelength coverage of these lasers, however, are limited by the emission spectra of the active ions or the transmission ranges of the laser host materials. Nonlinear optical frequency conversion laser, such as optical parametric oscillator (OPO) based on the KTP, RTP, ZnGeP2, MgO:PPLN [9][10][11][12] and the Raman laser based on stimulated Raman scattering (SRS), is another effective approach for generation of lasers around 2-5 µm. Compared with OPOs, SRS lasers have advantages such as automatic phase-matching with * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Wavelength-tunable diamond Raman laser at ∼2.5 μm

Shao

Shen

et al. 2021

Laser Phys. Lett.

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We report on wavelength tunable operation of a diamond Raman laser at ∼2.5 µm pumped by a narrow linewidth Q-switched Tm:YAP laser at 1.88 µm. The Raman laser operates at 50 Hz of repetition rate and produced stable pulses of 1.12 mJ energy and 9.2 ns duration, corresponding to a peak power of ∼121.7 kW. Over 56 mW of average output power has been generated for ∼197 mW of incident pump power, corresponding to a slope efficiency of 45.3%. Output wavelength was tunable from 2511.1 nm to 2522.1 nm via a birefringence filter and two etalons incorporated in the Tm:YAP laser resonator.

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High-power 3.8μm tunable optical parametric oscillator based on PPMgO:CLN

Cited by 22 publications

References 6 publications

Performance Studies of High-Power Optical Parametric Oscillators Pumped by a Pulsed Fiber Laser

Performance Studies of High-Power Optical Parametric Oscillators Pumped by a Pulsed Fiber Laser

High-efficiency broad-linewidth widely-tunable mid-infrared OPO based on fan-out PPLT

Wavelength-tunable diamond Raman laser at ∼2.5 μm

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